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South Carolina: Right-of-way and turning — Part 4 Practice Test

Questions in this part include: “What does a restricted crossing U-turn (RCUT) intersection eliminate from cross street approaches?” · “What is another name for a roundabout?”

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16 questions · About 6 min

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Questions are original and based on the official manual "South Carolina Driver's Manual" (2026 (posted April 2026)), South Carolina Department of Motor Vehicles.

All 16 questions in this practice test

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  1. At a DDI, what do vehicles making a left turn on to or off of ramps no longer do?

    Top view of a cross road passing over a freeway on a bridge, with ramps at its four corners and a double yellow line on the bridge; two cars drive on the cross road on either side of the bridge and two on the freeway.
    • Cross the paths of approaching through vehicles
    • Share a lane with right-turning vehicles
    • Enter the interchange from a side street
    • Yield to pedestrians at crosswalks
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    Correct answer: Cross the paths of approaching through vehicles

    The DDI design removes the need for left-turning vehicles to cross the paths of approaching through vehicles.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-5 · Open this page in the manual

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  2. Compared with a conventional diamond interchange, what does the DDI design do to the number of vehicle-to-vehicle conflict points?

    Top view of a cross road passing over a freeway on a bridge, with ramps at its four corners and a double yellow line on the bridge; two cars drive on the cross road on either side of the bridge and two on the freeway.
    • Slightly increases it
    • Leaves it unchanged
    • Significantly reduces it
    • Significantly increases it
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    Correct answer: Significantly reduces it

    The DDI design significantly reduces the number of vehicle-to-vehicle conflict points compared to a conventional diamond interchange.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-5 · Open this page in the manual

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  3. How does a DDI affect the severity of conflicts between vehicles?

    Top view of a cross road passing over a freeway on a bridge, with ramps at its four corners and a double yellow line on the bridge; two cars drive on the cross road on either side of the bridge and two on the freeway.
    • It increases their severity
    • It reduces their severity
    • It has no effect on severity
    • It raises severity at the ramps
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    Correct answer: It reduces their severity

    The manual says the DDI also reduces the severity of conflicts.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-6 · Open this page in the manual

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  4. What does a restricted crossing U-turn (RCUT) intersection eliminate from cross street approaches?

    • The right-turn and through movements
    • All left-turn and right-turn movements
    • The stop signs and traffic signals
    • The left-turn and through movements
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    Correct answer: The left-turn and through movements

    An RCUT removes the left-turn and through movements from the cross street approaches.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-6 · Open this page in the manual

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  5. How does an RCUT intersection require cross street drivers to make left-turn and through movements?

    A divided highway with a grass median that has no opening at the side road; a blue car waits at the side road.
    • Turn right, then make a U-turn at a median opening
    • Turn left directly across the main road after stopping
    • Cross on a signal-controlled bridge over the road
    • Turn left after yielding on a separate side road
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    Correct answer: Turn right, then make a U-turn at a median opening

    RCUT drivers turn right onto the main road and then make a U-turn at a one-way median opening.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-6 · Open this page in the manual

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  6. How may an RCUT intersection be controlled?

    A divided highway with a grass median that has no opening at the side road; a blue car waits at the side road.
    • Only by a traffic signal, never by signs
    • Only by a stop sign on the cross street
    • A signal, a stop sign, or a merge or yield sign
    • By yield signs only
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    Correct answer: A signal, a stop sign, or a merge or yield sign

    An RCUT may be controlled by a traffic signal, a stop sign, or a merge or yield sign.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-6 · Open this page in the manual

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  7. What is another name for a roundabout?

    • A diverging diamond
    • A traffic circle
    • A zipper merge
    • A three-point turnabout
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    Correct answer: A traffic circle

    The manual says a roundabout is also known as a traffic circle.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  8. In which direction do vehicles travel around the center island of a roundabout?

    An empty single-lane roundabout seen from above: a planted island in the center, a circular roadway and four roads joining it, with no cars and no signs.
    • Clockwise
    • Back and forth across the island
    • Toward the nearest exit only
    • Counterclockwise
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    Correct answer: Counterclockwise

    Vehicles travel counterclockwise around the raised center island of a roundabout.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  9. Who has the right-of-way at a roundabout?

    An empty single-lane roundabout seen from above: a planted island in the center, a circular roadway and four roads joining it, with no cars and no signs.
    • Traffic already circulating in it
    • Traffic waiting to enter the roundabout
    • The vehicle that arrives first at the entrance
    • Traffic entering from the right
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    Correct answer: Traffic already circulating in it

    Entering traffic must yield the right-of-way to circulating traffic.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  10. How should you approach a roundabout or traffic circle?

    A single-lane roundabout seen from above, with yield line markings at each entry and a blue car approaching from the bottom.
    • Speed up to merge with circulating traffic
    • Stop completely at the entrance every time
    • Slow down to enter it
    • Stay in the left lane until you are inside
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    Correct answer: Slow down to enter it

    You should slow down to enter a roundabout or traffic circle.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  11. In a roundabout or traffic circle, what do you do after you proceed to the appropriate exit?

    An overhead view of a circular intersection where cars travel around a raised planted island in the middle.
    • Sound your horn and exit
    • Exit without signaling
    • Stop in the circle to let others pass
    • Signal your intent and exit
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    Correct answer: Signal your intent and exit

    You proceed to the appropriate exit, signal your intent, and exit.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  12. To make a left turn at a roundabout, how far around do you go before completing your turn?

    A single-lane roundabout seen from above, with yield line markings at each entry and a blue car approaching from the bottom.
    • About three-quarters of the way around
    • About one-quarter of the way around
    • About halfway around
    • A full lap, then exit on the next road
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    Correct answer: About three-quarters of the way around

    For a left turn you yield to traffic in the roundabout and go three-quarters of the way around before completing the turn.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  13. How should you make a U-turn at a roundabout?

    A single-lane roundabout seen from above, with yield line markings at each entry and a blue car approaching from the bottom.
    • Go three-quarters of the way around, then exit
    • Stop at the entrance and back out onto the road
    • Stay right and exit on the same road you entered
    • Go halfway around and exit on the next road
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    Correct answer: Stay right and exit on the same road you entered

    For a U-turn you yield, stay to the right, continue around the roundabout and exit on the same road you entered from.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-7 · Open this page in the manual

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  14. Which types of collisions do roundabouts eliminate compared with traditional intersections?

    • Rear-end and lane-change
    • Head-on and high-speed right-angle
    • Low-speed parking lot collisions
    • Collisions with fixed objects
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    Correct answer: Head-on and high-speed right-angle

    Roundabouts are safer because they eliminate head-on and high-speed right-angle collisions.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-8 · Open this page in the manual

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  15. When changing lanes, how do you check your blind spots?

    A one-way road with two lanes: a blue car in the right lane with its left turn signal on, and a red car in the left lane just behind the blue car's left rear corner.
    • By checking only your rearview mirror, since it shows every area beside and behind you
    • By glancing at the side mirror on the side toward which you plan to move
    • By sounding your horn and moving over once other drivers have slowed
    • By turning your head and looking over your shoulder in the direction you plan to move
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    Correct answer: By turning your head and looking over your shoulder in the direction you plan to move

    Blind spots are checked by turning your head and looking over your shoulder toward the lane you want to enter.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-14 · Open this page in the manual

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  16. When changing lanes, after you identify a gap in traffic and signal, what do you do before steering into the lane?

    A blue car with its left turn signal on in the right lane, beside a small gap between a red car and a gray car in the left lane
    • Look again in the direction of the lane change
    • Brake to slow down below the other traffic
    • Sound your horn to warn other drivers
    • Cancel your turn signal
    Show answer

    Correct answer: Look again in the direction of the lane change

    After finding a gap and signaling, you look again toward the new lane, adjust speed, and then steer into the lane.

    Source: ⁨South Carolina Driver's Manual (2026 (posted April 2026))⁩, page 7-14 · Open this page in the manual

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